Volume 37 Issue 1
Feb 2023
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XU Hengwei, LIANG Bin, LIU Junxin, LU Yonggang, OU Xiaohong. Effect of Initiation Eccentricity on Shaped Charge Jet Forming Process and Power Parameters[J]. Chinese Journal of High Pressure Physics, 2023, 37(1): 015102. doi: 10.11858/gywlxb.20220635
Citation: XU Hengwei, LIANG Bin, LIU Junxin, LU Yonggang, OU Xiaohong. Effect of Initiation Eccentricity on Shaped Charge Jet Forming Process and Power Parameters[J]. Chinese Journal of High Pressure Physics, 2023, 37(1): 015102. doi: 10.11858/gywlxb.20220635

Effect of Initiation Eccentricity on Shaped Charge Jet Forming Process and Power Parameters

doi: 10.11858/gywlxb.20220635
  • Received Date: 21 Jul 2022
  • Rev Recd Date: 18 Aug 2022
  • Accepted Date: 16 Jan 2023
  • Available Online: 28 Feb 2023
  • Issue Publish Date: 05 Feb 2023
  • In order to study the influence of off-axis initiation on shaped charge jet, the finite element software LS-DYNA was used to simulate the jet forming and armor breaking process under different eccentricities (0.025Dk–0.125Dk, Dk is shaped charge diameter). The asymmetric collapse degree of the liner, jet shape and lateral velocity were investigated. A theoretical model was established to analyze the lateral velocity distribution of jet under different eccentricities. Based on the orthogonal experimental design theory and analysis of variance, the significant difference of the influence degree of each factor on the evaluation index was discussed. The results show that the degree of asymmetric collapse and lateral velocity of jet are positively correlated with the offset. When the offset is 0.025Dk, the percentage of penetration depth was only 0.7%. However, when the eccentricity was 0.050Dk, the percentage of penetration depth suddenly jumped to 12.4%. Moreover, the penetration depth continues to decrease with the increase of offset, seriously affecting the jet’s penetration performance. In addition, the influence of off-axis initiation on jet lateral velocity can be compensated by increasing the thickness of liner and the explosive height above liner.

     

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